RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000641 R14: 00000000006fc6b8 R15: 0000000000000002
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 8126 Comm: modprobe Not tainted 4.16.0+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82
RSP: 0018:ffff8801dae06970 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8801d70b46f8
RDX: 0000000000000007 RSI: ffffffff81783421 RDI: 0000000000000038
RBP: ffff8801dae06988 R08: ffffed003b5c46c3 R09: 0000000000000001
R10: ffff8801dae06a18 R11: ffff8801dae23613 R12: ffff8801a1c10140
R13: ffff8801d70b46c0 R14: ffff8801d70b46fc R15: 0000000000000002
FS: 00007f349a10e700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f349a113000 CR3: 00000001b0cfd000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000020000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
delayacct_blkio_end include/linux/delayacct.h:128 [inline]
try_to_wake_up+0xa89/0x1190 kernel/sched/core.c:2034
default_wake_function+0x30/0x50 kernel/sched/core.c:3743
autoremove_wake_function+0x7a/0x350 kernel/sched/wait.c:373
wake_page_function+0x15f/0x1c0 mm/filemap.c:1010
__wake_up_common+0x189/0x730 kernel/sched/wait.c:90
__wake_up_locked_key_bookmark+0x16/0x20 kernel/sched/wait.c:165
wake_up_page_bit+0x297/0x580 mm/filemap.c:1030
unlock_page+0x214/0x2b0 mm/filemap.c:1207
mpage_end_io+0x228/0x4c0 fs/ext4/readpage.c:93
bio_endio+0x4b8/0x920 block/bio.c:1775
req_bio_endio block/blk-core.c:280 [inline]
blk_update_request+0x3a3/0xcb0 block/blk-core.c:3076
scsi_end_request+0xd3/0x870 drivers/scsi/scsi_lib.c:672
scsi_io_completion+0xca9/0x1d10 drivers/scsi/scsi_lib.c:891
scsi_finish_command+0x542/0x8d0 drivers/scsi/scsi.c:248
scsi_softirq_done+0x3d9/0x4b0 drivers/scsi/scsi_lib.c:1676
__blk_mq_complete_request+0x4c8/0x9f0 block/blk-mq.c:551
blk_mq_complete_request+0x2a5/0x370 block/blk-mq.c:636
scsi_mq_done+0xe2/0x430 drivers/scsi/scsi_lib.c:1987
virtscsi_complete_cmd+0x573/0x740 drivers/scsi/virtio_scsi.c:207
virtscsi_vq_done+0xc3/0x170 drivers/scsi/virtio_scsi.c:223
virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238
vring_interrupt+0x128/0x170 drivers/virtio/virtio_ring.c:950
__handle_irq_event_percpu+0x1c0/0xad0 kernel/irq/handle.c:149
handle_irq_event_percpu+0x98/0x1c0 kernel/irq/handle.c:189
handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206
handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791
generic_handle_irq_desc include/linux/irqdesc.h:159 [inline]
handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77
do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245
common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:641
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline]
RIP: 0010:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923
RSP: 0018:ffff8801ab82fb18 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffda
RAX: dffffc0000000000 RBX: 1ffff10035705f68 RCX: 0000000000000000
RDX: 1ffffffff11a30ed RSI: ffff8801a1c10978 RDI: 0000000000000282
RBP: ffff8801ab82fc08 R08: 00000000000043df R09: 0000000000000000
R10: ffff8801a1c10978 R11: ffff8801a1c10140 R12: ffff8801a1c10140
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739
fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740
slab_pre_alloc_hook mm/slab.h:418 [inline]
slab_alloc mm/slab.c:3378 [inline]
kmem_cache_alloc+0x29/0x760 mm/slab.c:3552
getname_flags+0xd0/0x5a0 fs/namei.c:140
getname+0x19/0x20 fs/namei.c:211
do_sys_open+0x39a/0x740 fs/open.c:1087
SYSC_open fs/open.c:1111 [inline]
SyS_open+0x2d/0x40 fs/open.c:1106
do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f3499a26120
RSP: 002b:00007fffee833588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3499a26120
RDX: 0000000000000000 RSI: 0000000000080000 RDI: 00007f3499cf19b8
RBP: 0000560afcd95250 R08: 00007f349a10e700 R09: 00007fffee833678
R10: 0000000000000000 R11: 0000000000000246 R12: 0000560afcd95200
R13: 0000560afcd95110 R14: 0000560afcd95200 R15: 00007fffee8337a0
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 48 8b 9b 30 12 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 38 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 51 44 8b 63 38 31 ff 41 83 e4
RIP: __delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82 RSP: ffff8801dae06970
======================================================
WARNING: possible circular locking dependency detected
4.16.0+ #7 Not tainted
------------------------------------------------------
modprobe/8126 is trying to acquire lock:
000000006ba92cd7 ((console_sem).lock){-...}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
but task is already holding lock:
000000002a6a9e20 (&p->pi_lock){-.-.}, at: try_to_wake_up+0xca/0x1190 kernel/sched/core.c:1963
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&p->pi_lock){-.-.}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
try_to_wake_up+0xca/0x1190 kernel/sched/core.c:1963
wake_up_process+0x10/0x20 kernel/sched/core.c:2126
__up.isra.1+0x1b8/0x290 kernel/locking/semaphore.c:262
up+0x12f/0x1b0 kernel/locking/semaphore.c:187
__up_console_sem+0xbe/0x1b0 kernel/printk/printk.c:242
console_unlock+0x7d6/0x1100 kernel/printk/printk.c:2417
do_con_write+0x12b2/0x2280 drivers/tty/vt/vt.c:2437
con_write+0x25/0xc0 drivers/tty/vt/vt.c:2786
process_output_block drivers/tty/n_tty.c:579 [inline]
n_tty_write+0x6b9/0x1180 drivers/tty/n_tty.c:2308
do_tty_write drivers/tty/tty_io.c:958 [inline]
tty_write+0x3f1/0x880 drivers/tty/tty_io.c:1042
__vfs_write+0x10b/0x960 fs/read_write.c:485
vfs_write+0x1f8/0x560 fs/read_write.c:549
ksys_write+0xf9/0x250 fs/read_write.c:598
SYSC_write fs/read_write.c:610 [inline]
SyS_write+0x24/0x30 fs/read_write.c:607
do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
-> #0 ((console_sem).lock){-...}:
lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:225
console_trylock+0x15/0xa0 kernel/printk/printk.c:2229
console_trylock_spinning kernel/printk/printk.c:1643 [inline]
vprintk_emit+0x694/0xdd0 kernel/printk/printk.c:1906
vprintk_default+0x28/0x30 kernel/printk/printk.c:1947
vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:379
printk+0x9e/0xba kernel/printk/printk.c:1980
kasan_die_handler.cold.22+0x11/0x30 arch/x86/mm/kasan_init_64.c:253
notifier_call_chain+0x178/0x380 kernel/notifier.c:93
__atomic_notifier_call_chain kernel/notifier.c:183 [inline]
atomic_notifier_call_chain+0x98/0x190 kernel/notifier.c:193
notify_die+0x1a3/0x2b0 kernel/notifier.c:549
do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:558
general_protection+0x25/0x50 arch/x86/entry/entry_64.S:1158
__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82
delayacct_blkio_end include/linux/delayacct.h:128 [inline]
try_to_wake_up+0xa89/0x1190 kernel/sched/core.c:2034
default_wake_function+0x30/0x50 kernel/sched/core.c:3743
autoremove_wake_function+0x7a/0x350 kernel/sched/wait.c:373
wake_page_function+0x15f/0x1c0 mm/filemap.c:1010
__wake_up_common+0x189/0x730 kernel/sched/wait.c:90
__wake_up_locked_key_bookmark+0x16/0x20 kernel/sched/wait.c:165
wake_up_page_bit+0x297/0x580 mm/filemap.c:1030
unlock_page+0x214/0x2b0 mm/filemap.c:1207
mpage_end_io+0x228/0x4c0 fs/ext4/readpage.c:93
bio_endio+0x4b8/0x920 block/bio.c:1775
req_bio_endio block/blk-core.c:280 [inline]
blk_update_request+0x3a3/0xcb0 block/blk-core.c:3076
scsi_end_request+0xd3/0x870 drivers/scsi/scsi_lib.c:672
scsi_io_completion+0xca9/0x1d10 drivers/scsi/scsi_lib.c:891
scsi_finish_command+0x542/0x8d0 drivers/scsi/scsi.c:248
scsi_softirq_done+0x3d9/0x4b0 drivers/scsi/scsi_lib.c:1676
__blk_mq_complete_request+0x4c8/0x9f0 block/blk-mq.c:551
blk_mq_complete_request+0x2a5/0x370 block/blk-mq.c:636
scsi_mq_done+0xe2/0x430 drivers/scsi/scsi_lib.c:1987
virtscsi_complete_cmd+0x573/0x740 drivers/scsi/virtio_scsi.c:207
virtscsi_vq_done+0xc3/0x170 drivers/scsi/virtio_scsi.c:223
virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238
vring_interrupt+0x128/0x170 drivers/virtio/virtio_ring.c:950
__handle_irq_event_percpu+0x1c0/0xad0 kernel/irq/handle.c:149
handle_irq_event_percpu+0x98/0x1c0 kernel/irq/handle.c:189
handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206
handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791
generic_handle_irq_desc include/linux/irqdesc.h:159 [inline]
handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77
do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245
ret_from_intr+0x0/0x1e
arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline]
lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923
fs_reclaim_acquire.part.82+0x24/0x30 mm/page_alloc.c:3739
fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740
slab_pre_alloc_hook mm/slab.h:418 [inline]
slab_alloc mm/slab.c:3378 [inline]
kmem_cache_alloc+0x29/0x760 mm/slab.c:3552
getname_flags+0xd0/0x5a0 fs/namei.c:140
getname+0x19/0x20 fs/namei.c:211
do_sys_open+0x39a/0x740 fs/open.c:1087
SYSC_open fs/open.c:1111 [inline]
SyS_open+0x2d/0x40 fs/open.c:1106
do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&p->pi_lock);
lock((console_sem).lock);
lock(&p->pi_lock);
lock((console_sem).lock);
*** DEADLOCK ***
6 locks held by modprobe/8126:
#0: 00000000c12c6b33 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.82+0x0/0x30 mm/page_alloc.c:463
#1: 00000000d3919c37 (&(&virtscsi_vq->vq_lock)->rlock){-.-.}, at: virtscsi_vq_done+0x9d/0x170 drivers/scsi/virtio_scsi.c:219
#2: 00000000d6996c84 (rcu_read_lock){....}, at: hctx_lock+0x7a/0x1d0 block/blk-mq.c:570
#3: 0000000026988bf5 (&page_wait_table[i]){-.-.}, at: wake_up_page_bit+0x27d/0x580 mm/filemap.c:1029
#4: 000000002a6a9e20 (&p->pi_lock){-.-.}, at: try_to_wake_up+0xca/0x1190 kernel/sched/core.c:1963
#5: 00000000d6996c84 (rcu_read_lock){....}, at: atomic_notifier_call_chain+0x0/0x190 include/linux/compiler.h:188
stack backtrace:
CPU: 0 PID: 8126 Comm: modprobe Not tainted 4.16.0+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
print_circular_bug.isra.36.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1223
check_prev_add kernel/locking/lockdep.c:1863 [inline]
check_prevs_add kernel/locking/lockdep.c:1976 [inline]
validate_chain kernel/locking/lockdep.c:2417 [inline]
__lock_acquire+0x343e/0x5140 kernel/locking/lockdep.c:3431
lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xae/0x200 kernel/printk/printk.c:225
console_trylock+0x15/0xa0 kernel/printk/printk.c:2229
console_trylock_spinning kernel/printk/printk.c:1643 [inline]
vprintk_emit+0x694/0xdd0 kernel/printk/printk.c:1906
vprintk_default+0x28/0x30 kernel/printk/printk.c:1947
vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:379
printk+0x9e/0xba kernel/printk/printk.c:1980
kasan_die_handler.cold.22+0x11/0x30 arch/x86/mm/kasan_init_64.c:253
notifier_call_chain+0x178/0x380 kernel/notifier.c:93
__atomic_notifier_call_chain kernel/notifier.c:183 [inline]
atomic_notifier_call_chain+0x98/0x190 kernel/notifier.c:193
notify_die+0x1a3/0x2b0 kernel/notifier.c:549
do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:558
general_protection+0x25/0x50 arch/x86/entry/entry_64.S:1158
RIP: 0010:__delayacct_blkio_end+0x4f/0xc0 kernel/delayacct.c:82
RSP: 0018:ffff8801dae06970 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8801d70b46f8
RDX: 0000000000000007 RSI: ffffffff81783421 RDI: 0000000000000038
RBP: ffff8801dae06988 R08: ffffed003b5c46c3 R09: 0000000000000001
R10: ffff8801dae06a18 R11: ffff8801dae23613 R12: ffff8801a1c10140
R13: ffff8801d70b46c0 R14: ffff8801d70b46fc R15: 0000000000000002
delayacct_blkio_end include/linux/delayacct.h:128 [inline]
try_to_wake_up+0xa89/0x1190 kernel/sched/core.c:2034
default_wake_function+0x30/0x50 kernel/sched/core.c:3743
autoremove_wake_function+0x7a/0x350 kernel/sched/wait.c:373
wake_page_function+0x15f/0x1c0 mm/filemap.c:1010
__wake_up_common+0x189/0x730 kernel/sched/wait.c:90
__wake_up_locked_key_bookmark+0x16/0x20 kernel/sched/wait.c:165
wake_up_page_bit+0x297/0x580 mm/filemap.c:1030
unlock_page+0x214/0x2b0 mm/filemap.c:1207
mpage_end_io+0x228/0x4c0 fs/ext4/readpage.c:93
bio_endio+0x4b8/0x920 block/bio.c:1775
? __sanitize
Lost 113 message(s)!
---[ end trace 3a94c2981ebdc9ca ]---